A high-precision straightening machine based on multi-roller combination

Abstract

This invention discloses a high-precision straightening machine based on multi-roller combination, specifically relating to the technical field of metal material plastic forming and straightening equipment. The straightening machine includes a device table, a work frame, a carrier frame, and a drive and clamping system. The core feature is that the work frame is equipped with multiple upper straightening rollers arranged in a staggered pattern, each with an independently adjustable height, forming a multi-roller combination straightening unit together with the lower straightening rollers. Through independent lifting and adjusting components (including worm gears and threaded pairs), different downward pressures can be applied to each pair of upper rollers, achieving "fixed-point, quantitative" straightening of localized workpiece bending. Simultaneously, the moving stage and transmission stage on the carrier frame constitute a three-dimensionally adjustable conveying and clamping system, adaptable to workpieces of different sizes, and providing stable, variable-speed traction force during straightening to prevent slippage. This design enables continuous straightening processing of complex cross-section workpieces with high precision and high adaptability, improving straightening quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of metal material plastic forming and straightening technology, specifically a high-precision straightening machine based on multi-roller combination. Background Technology

[0002] Long, strip-shaped workpieces such as metal sheets, pipes, bars, and sections inevitably undergo plastic deformation such as bending, twisting, and undulation during rolling, heat treatment, transportation, and storage. To meet the precision requirements of subsequent processing and assembly, they must be straightened. Existing straightening machines, especially multi-roll straighteners, typically use two rows of staggered straightening rollers to repeatedly bend the workpiece, utilizing the elastic-plastic deformation principle of the material to eliminate its internal stress and curvature. However, such equipment has some limitations in practical applications. First, the feeding and clamping mechanisms of traditional straighteners have poor adaptability, making it difficult to achieve stable and reliable clamping and conveying of workpieces with different heights, widths, and cross-sectional shapes. During high-intensity straightening, the friction between the workpiece and the straightening rollers is high. If the clamping and conveying system cannot provide a matching, stable, and adjustable traction force, the workpiece is prone to slipping, stalling, or even deviating in the straightening zone, seriously affecting the continuity of the straightening process and the final straightness of the workpiece. Secondly, most multi-roll straighteners use an integral frame and a unified pressing mechanism for the upper straightening roller system, which makes it inconvenient to independently adjust the pressure of individual straightening rollers. To address this issue, we propose a high-precision straightener and method based on multi-roll combination to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision straightening machine based on multi-roller combination to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A high-precision straightening machine based on multi-roller combination includes a device platform, a work frame mounted on the top of the device platform, and a carrying frame mounted on the outside of the device platform. A movable platform that can be raised and lowered as a whole is vertically slidably connected to the top of the carrying frame for adaptive positioning of workpieces of different heights. A transmission platform that can slide laterally towards each other or backwards is symmetrically arranged on the movable platform to clamp or release the workpiece from both sides to accommodate materials of different widths. Each transmission platform is equipped with an actively operating conveying component, which provides a stable and variable-speed traction force to the workpiece during the straightening process to prevent the workpiece from slipping in the roller gap. The work frame is externally rotatably connected to multiple lower straightening rollers, and the top of the work frame is correspondingly provided with multiple vertically sliding upper straightening rollers. The upper and lower straightening rollers are arranged alternately to form a straightening roller system. The work frame is also provided with a lifting adjustment component for independently adjusting the height of each upper straightening roller.

[0005] Preferably, the top of the work frame is symmetrically fixedly connected with multiple lifting frames, and the inside of each lifting frame is symmetrically slidably connected with a roller platform. A first connecting rod is fixedly connected between two roller platforms, and the end of the first connecting rod is rotatably connected to the upper straightening roller.

[0006] Preferably, the lifting adjustment assembly includes a first threaded rod, a worm gear, a worm wheel, a first control handle, and a third sliding rod; A third sliding rod is slidably connected inside the lifting frame on one side, and the third sliding rod is fixedly connected to the roller platform on the same side; a square frame is fixedly connected to the top of the lifting frame on the other side, the worm gear is rotatably connected inside the square frame, the worm is rotatably connected inside the square frame and meshes with the worm gear for transmission, the first control handle is fixedly connected to the end of the worm, the first threaded rod is slidably connected to the outside of the square frame and threadedly connected to the center position of the worm gear, and the end of the first threaded rod is fixedly connected to the roller platform on the opposite side.

[0007] Preferably, a hydraulic cylinder is installed at the inner bottom of the rack, and a plurality of first sliding rods are fixedly connected to the inner bottom of the rack. The output end of the hydraulic cylinder is fixedly connected to the moving platform, and the moving platform is slidably connected to the first sliding rods.

[0008] Preferably, a support plate is symmetrically fixedly connected to the top of the moving platform, and a second control handle is rotatably connected to the outside of each support plate. A second threaded rod is fixedly connected to the connecting end of the second control handle, and the second threaded rod is rotatably connected to the support plate. A second sliding rod is symmetrically fixedly connected to the inside of the support plate, and a square slider is slidably connected to the outside of the second sliding rod. The square slider is threadedly connected to the second threaded rod, and the transmission platform is fixedly connected to the square slider.

[0009] Preferably, the transmission assembly includes a third gear, a fourth gear, a second transmission belt, and a circular rotating block; The third and fourth gears are rotatably connected to the two ends inside the transmission platform, respectively. The second transmission belt meshes with the outside of the third and fourth gears and is connected to them in a transmission manner. Multiple circular rotating blocks are rotatably connected inside the transmission platform and located inside the second transmission belt. A second motor is installed on the outside of the transmission platform. The output shaft of the second motor extends into the transmission platform and is connected to the third gear in a transmission manner.

[0010] Preferably, the work frame is symmetrically fixedly connected to multiple mounting frames, and each mounting frame is rotatably connected to a second connecting rod via bearings. One end of the second connecting rod is fixedly connected to the corresponding lower straightening roller, and the other end is fixedly connected to a transmission gear set.

[0011] Preferably, the transmission gear set includes a plurality of first gears and a plurality of second gears; The first gear and the second gear are arranged along the first axis and correspond one-to-one with the lower straightening roller. The gears at the beginning and end are single gears, and the gears in the middle are double gears. The gear closer to the work frame is the first gear, and the gear further away from the work frame is the second gear. Adjacent first gears and adjacent second gears are connected by meshing transmission through the first transmission toothed belt.

[0012] Preferably, a shelf is installed on the top of the device platform, and a first motor is installed inside the shelf. The output shaft of the first motor is connected to a first gear located at one end via a coupling.

[0013] Preferably, the surfaces of both the upper and lower straightening rollers are provided with textures and coatings to increase friction.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This high-precision straightening machine based on a multi-roller combination comprises a vertically adjustable moving table driven by a hydraulic cylinder, a horizontally adjustable transmission table driven by a threaded pair, and a belt conveyor assembly installed inside the transmission table. These components form a three-dimensional adjustable feeding and clamping system with active traction. This system not only adapts to workpieces of different heights, widths, and cross-sections, but more importantly, it provides stable, continuous, and adjustable traction force to the workpiece during the straightening process. This effectively prevents the workpiece from slipping, stalling, or deviating due to increased resistance during forceful straightening, improving the smoothness and continuity of the straightening process, while also increasing processing efficiency and quality.

[0015] 2. This high-precision straightening machine based on a multi-roller combination achieves independent, high-precision, and self-locking adjustment of the pressing amount of each straightening roll by setting an independent lifting and adjusting component containing a worm gear and threaded pair above each upper straightening roll. Operators can individually adjust the height of the upper straightening rolls at different positions according to the initial bending detection curve of the workpiece, applying different straightening forces to different bending areas to achieve "fixed-point, quantitative" straightening. This greatly improves the straightening accuracy and adaptability for complex bending deformation workpieces, solving the problem of poor local straightening in traditional integral pressing straightening machines. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the work frame in this invention; Figure 4 This is a schematic diagram of the lifting frame in this invention; Figure 5 This is a schematic diagram of the cross-section of the lifting frame in this invention; Figure 6 This is a schematic diagram of the structure of the shelf in this invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the shelf in this invention.

[0018] In the diagram: 1. Device platform; 2. Work frame; 3. Carrier frame; 401. Upper straightening roller; 402. Lower straightening roller; 5. Shelf; 6. First motor; 7. Mounting frame; 8. Lifting frame; 901. First gear; 902. Second gear; 11. First transmission toothed belt; 12. Square frame; 13. First threaded rod; 14. Roller platform; 15. First connecting rod; 16. Worm gear; 17. Worm wheel; 18. First control handle; 19. First sliding rod; 20. Moving platform; 22. Second control handle; 23. Second threaded rod; 24. Second sliding rod; 25. Transmission platform; 26. Hydraulic cylinder; 27. Second motor; 28. Square slider; 29. ​​Third gear; 30. Fourth gear; 31. Second transmission toothed belt; 32. Circular rotating block; 33. Second connecting rod; 34. Third sliding rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Figures 1-7As shown, the present invention provides a high-precision straightening machine based on multi-roller combination, including a device platform 1, a work frame 2 mounted on the top of the device platform 1, a carrier frame 3 mounted on the outside of the device platform 1, and a vertically slidable movable platform 20 that can be raised and lowered as a whole connected to the top of the carrier frame 3, for adaptive positioning of workpieces of different heights. The movable platform 20 is symmetrically provided with transmission platforms 25 that can slide laterally towards each other or backwards, for clamping or releasing the workpiece from both sides to adapt to materials of different widths. The transmission platforms 25 are all equipped with actively operating conveying components, which are used to provide stable and variable speed traction force to the workpiece during the straightening process to prevent the workpiece from slipping in the roller gap. The work frame 2 is externally rotatably connected to multiple lower straightening rollers 402. The top of the work frame 2 is correspondingly provided with multiple vertically sliding upper straightening rollers 401, and the upper straightening rollers 401 and lower straightening rollers 402 are arranged alternately to form a straightening roller system. The work frame 2 is also provided with a lifting adjustment component for independently adjusting the height of each upper straightening roller 401.

[0021] It should be noted that, in this embodiment, the vertical sliding of the moving table 20 can adjust the height of the workpiece to accommodate materials of different heights; the lateral sliding of the transmission table 25, facing or moving away from each other, can clamp or release workpieces of different widths, achieving width self-adaptation; the conveying component integrated in the transmission table 25 can provide stable and variable-speed active traction force to ensure smooth conveying of the workpiece during straightening and prevent slippage. The moving table 20, transmission table 25, and conveying component together constitute a three-dimensional adaptive feeding and clamping system that is adjustable in height, width, and feed direction. The lower straightening roller 402 and the upper straightening roller 401 are arranged alternately to form a straightening roller system that can repeatedly bend the workpiece; by setting a lifting adjustment component separately for each upper straightening roller 401, its height can be adjusted independently and precisely, thereby applying differentiated straightening forces to different bending areas on the workpiece to achieve high-precision straightening with "fixed point and quantitative" straightening.

[0022] Multiple lifting frames 8 are symmetrically fixedly connected to the top of the work frame 2. Roller platforms 14 are symmetrically slidably connected inside the lifting frames 8. A first connecting rod 15 is fixedly connected between two roller platforms 14. The end of the first connecting rod 15 is rotatably connected to the upper straightening roller 401.

[0023] It should be noted that in this embodiment, the design slides the roller base 14 supporting the upper straightening roller 401 to the slide groove of the lifting frame 8, ensuring the straightness and stability of the lifting. The shaft of the upper straightening roller 401 is connected to the end of the first connecting rod 15 through a bearing, so that the straightening roller can both adjust the pressing amount by lifting and lowering as a whole with the roller base 14, and can also rotate freely to adapt to the movement of the workpiece, reducing sliding friction.

[0024] The lifting adjustment assembly includes a first threaded rod 13, a worm gear 16, a worm wheel 17, a first control handle 18, and a third sliding rod 34; A third sliding rod 34 is slidably connected inside the lifting frame 8 on one side, and the third sliding rod 34 is fixedly connected to the roller table 14 on the same side; a square frame 12 is fixedly connected to the top of the lifting frame 8 on the other side, a worm gear 17 is rotatably connected inside the square frame 12, a worm 16 is rotatably connected inside the square frame 12 and meshes with the worm gear 17 for transmission, a first control handle 18 is fixedly connected to the end of the worm 16, a first threaded rod 13 is slidably connected to the outside of the square frame 12 and threadedly connected to the center position of the worm gear 17, and the end of the first threaded rod 13 is fixedly connected to the roller table 14 on the opposite side.

[0025] It should be noted that in this embodiment, during operation, rotating the first control handle 18 drives the worm gear 16 to rotate. The worm gear 16 drives the meshing worm wheel 17 to rotate. Since the worm wheel 17 has an internal thread that mates with the first threaded rod 13, the rotation of the worm wheel 17 drives the first threaded rod 13 to produce axial linear motion. Since the end of the first threaded rod 13 is fixedly connected to the roller platform 14 on one side, this linear motion will pull or push the roller platform 14 on that side. At the same time, the roller platform 14 on the opposite side slides in the groove of the lifting frame 8 through the third sliding rod 34 fixed thereto, playing a guiding and supporting role. The worm gear transmission has the advantages of large reduction ratio, smooth transmission, and self-locking, allowing the operator to make fine adjustments to the first control handle 18 with a small force, thereby accurately controlling the downward pressure of the upper straightening roller 401. Once adjusted in place, the self-locking characteristic of the worm gear prevents it from rotating back on its own under the reaction force of the workpiece, ensuring the stability of the straightening pressure.

[0026] A hydraulic cylinder 26 is installed on the inner bottom of the shelf 3. A plurality of first sliding rods 19 are also fixedly connected to the inner bottom of the shelf 3. The output end of the hydraulic cylinder 26 is fixedly connected to the moving platform 20, and the moving platform 20 is slidably connected to the first sliding rods 19.

[0027] It should be noted that in this embodiment, the hydraulic cylinder 26 serves as the power source, driving the moving table 20 to rise and fall along the first sliding rod 19 in the vertical direction. This allows the height of the entire clamping and conveying mechanism (transmission table 25 and its components) to be quickly and widely adjusted according to the initial height of the workpiece to be straightened or the positional changes during the straightening process, ensuring that the conveying components on the transmission table 25 can reliably contact and clamp the workpiece.

[0028] A support plate 21 is symmetrically fixedly connected to the top of the moving platform 20. A second control handle 22 is rotatably connected to the outside of the support plate 21. A second threaded rod 23 is fixedly connected to the connecting end of the second control handle 22. The second threaded rod 23 is rotatably connected to the support plate 21. A second sliding rod 24 is symmetrically fixedly connected to the inside of the support plate 21. A square slider 28 is slidably connected to the outside of the second sliding rod 24. The square slider 28 is threadedly connected to the second threaded rod 23. The transmission platform 25 is fixedly connected to the square slider 28.

[0029] It should be noted that in this embodiment, this part realizes the lateral adjustment of the distance between the two transmission tables 25. When it is necessary to clamp the workpiece, the second control handles 22 on both sides are rotated separately or simultaneously according to the width of the workpiece. The second control handles 22 drive the second threaded rod 23 to rotate. Since the second threaded rod 23 is threadedly connected to the square slider 28, and the square slider 28 is constrained by the second sliding rod 24 to slide only laterally, the rotation of the second threaded rod 23 is converted into the linear movement of the square slider 28 (together with the transmission table 25 on it) along the second sliding rod 24. In this way, the two transmission tables 25 can move towards each other to clamp the workpiece, or move away from each other to release the workpiece, adapting to plates, profiles, etc. of different widths.

[0030] The transmission assembly includes a third gear 29, a fourth gear 30, a second transmission belt 31, and a circular rotating block 32; The third gear 29 and the fourth gear 30 are rotatably connected to the two ends inside the transmission platform 25, respectively. The second transmission belt 31 meshes with the third gear 29 and the fourth gear 30 and is connected to them in a transmission manner. Multiple circular rotating blocks 32 are rotatably connected inside the transmission platform 25 and located inside the second transmission belt 31. A second motor 27 is installed on the outside of the transmission platform 25. The output shaft of the second motor 27 extends into the transmission platform 25 and is connected to the third gear 29 in a transmission manner.

[0031] It should be noted that in this embodiment, the conveying component is the direct power source for the workpiece's forward movement. The second motor 27 is started, driving the third gear 29 to rotate, which in turn drives the fourth gear 30 to rotate synchronously via the second transmission belt 31. The outer surface of the second transmission belt 31 contacts the lower surface of the workpiece. As the second transmission belt 31 moves, it relies on friction to drive the workpiece forward (or backward), passing through the straightening zone formed by the upper and lower straightening rollers. The circular rotating block 32 supports and tensions the non-working side of the second transmission belt 31, ensuring sufficient contact area and stable friction with the workpiece. By controlling the speed and direction of the second motor 27, stepless adjustment of the workpiece feed speed and reciprocating straightening operations can be achieved.

[0032] Multiple mounting brackets 7 are symmetrically fixedly connected to the outside of the work frame 2. Each mounting bracket 7 is rotatably connected to a second connecting rod 33 via a bearing. One end of the second connecting rod 33 is fixedly connected to the corresponding lower straightening roller 402, and the other end is fixedly connected to a transmission gear set.

[0033] It should be noted that, in this embodiment, the mounting frame 7 provides an independent and robust mounting base for the drive system of the lower straightening roller 402. One end of the second connecting rod 33 is connected to the shaft of the lower straightening roller 402, and the other end is connected to the drive gear, transmitting the drive torque to the straightening roller. At the same time, its bearing connection ensures the flexibility of rotation.

[0034] The transmission gear set includes multiple first gears 901 and multiple second gears 902; The first gear 901 and the second gear 902 are arranged along the first axis and correspond one-to-one with the lower straightening roller 402. The gears at the beginning and end are single gears, while the gears in the middle are double gears. The gear closer to the work frame 2 is the first gear 901, and the gear further away from the work frame 2 is the second gear 902. Adjacent first gears 901 and adjacent second gears 902 are connected by meshing transmission through the first transmission belt 11.

[0035] It should be noted that in this embodiment, the design is a spatially staggered synchronous transmission system. The rotation shafts (i.e., the second connecting rods 33) of all lower straightening rollers 402 are parallel but staggered. By arranging the first gear 901 and the second gear 902 on two planes near and far from the work frame 2, respectively, and connecting the transmission chains on both sides with a middle double gear (which has the functions of both the first gear 901 and the second gear 902, but is coaxially fixed), all lower straightening rollers 402 can achieve completely synchronous rotation through the meshing transmission of the first transmission belt 11 by a single power source (first motor 6). This ensures that the linear velocity of the lower straightening rollers 402 relative to the lower surface of the workpiece is consistent when the workpiece passes through each roller gap, avoiding sliding friction and surface damage caused by speed differences.

[0036] A shelf 5 is installed on the top of the device platform 1. A first motor 6 is installed inside the shelf 5. The output shaft of the first motor 6 is connected to a first gear 901 located at one end via a coupling.

[0037] It should be noted that, in this embodiment, the shelf 5 is used to install and support the first motor 6. After the first motor 6 is started, its output torque is directly transmitted to the driving gear (first gear 901) at one end of the transmission gear set through the coupling, and then drives all the lower straightening rollers 402 to rotate synchronously through the entire gear-belt transmission system, providing basic forward driving force for the workpiece.

[0038] The surfaces of both the upper straightening roller 401 and the lower straightening roller 402 are provided with textures and coatings to increase friction.

[0039] It should be noted that, in this embodiment, these surface treatments significantly increase the coefficient of friction between the roller surface and the metal workpiece (especially smooth surfaces such as steel plates, aluminum plates, and stainless steel pipes). During the straightening process, this helps prevent the workpiece from slipping between the rollers, ensuring that the straightening deformation is effectively applied to the workpiece; during the feeding process, combined with the conveyor assembly, it can provide stronger traction, ensuring smooth feeding, which is especially crucial when straightening high yield strength materials.

[0040] In summary, this high-precision straightening machine based on multi-roller combination operates by placing the workpiece to be straightened on the second transmission toothed belt 31 between two transmission tables 25. Based on the workpiece width, rotating the second control handles 22 on both sides drives the transmission tables 25 to move laterally, clamping the workpiece from both sides. Based on the workpiece height, activating the hydraulic cylinder 26 adjusts the height of the moving table 20, roughly aligning the workpiece with the inlet between the upper and lower straightening rollers. The pressing amount of each upper straightening roller 401 is preset based on the workpiece's material, cross-sectional dimensions, and preliminary bending measurements. The first control handles 18 on each lifting frame 8 are rotated sequentially, and through the transmission of the worm gear and the first threaded rod 13, the height of each upper straightening roller 401 is independently adjusted, forming a straightening roller gap that meets the requirements with the corresponding lower straightening roller 402. This step allows for locally differentiated pressing amount settings. First, the first motor 6 is started, driving all lower straightening rollers 402 to rotate synchronously. Then, the two second motors 27 are started to drive the second transmission toothed belts 31 in the two transmission tables 25 to rotate. Under the action of friction, the workpiece is smoothly sent into the straightening area of ​​the work frame 2.

[0041] The workpiece enters between staggered upper and lower straightening rollers. The upper straightening roller 401 applies pressure to the upper surface of the workpiece under a preset pressure, while the lower straightening roller 402 provides support and rotational power. Together, they cause repeated bending and plastic deformation of the workpiece, gradually eliminating its unevenness. Since the pressure of each upper roller can be independently controlled, precise straightening of different bending areas of the workpiece can be achieved. Based on the test results after straightening, the pressure of the relevant upper straightening roller 401 can be fine-tuned, and secondary or multiple reciprocating straightening operations can be performed until the required straightness is achieved. After straightening is completed, the first motor 6 and the second motor 27 are stopped. The hydraulic cylinder 26 is controlled to lower the moving table 20, and then the second control handle 22 is rotated to release the workpiece from the transmission table 25, allowing the straightened workpiece to be removed.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision straightening machine based on multi-roller combination, comprising a device table (1), a work frame (2) mounted on the top of the device table (1), and a load rack (3) mounted on the outside of the device table (1), characterized in that: The top of the carrier (3) is vertically slidably connected to a movable platform (20) that can be raised and lowered as a whole, for adaptive positioning of workpieces of different heights. The movable platform (20) is symmetrically provided with transmission platforms (25) that can slide laterally towards each other or away from each other, for clamping or releasing the workpiece from both sides to accommodate materials of different widths. The transmission platforms (25) are all equipped with actively operating conveying components. The conveying components are used to provide a stable and variable speed traction force for the workpiece during the straightening process to prevent the workpiece from slipping in the roller gap. The work frame (2) is externally rotatably connected to multiple lower straightening rollers (402), and the top of the work frame (2) is correspondingly provided with multiple vertically sliding upper straightening rollers (401). The upper straightening rollers (401) and the lower straightening rollers (402) are arranged alternately to form a straightening roller system. The work frame (2) is also provided with a lifting adjustment component for independently adjusting the height of each upper straightening roller (401).

2. The high-precision straightening machine based on multi-roller combination according to claim 1, characterized in that: The top of the work frame (2) is symmetrically fixedly connected with multiple lifting frames (8), and the inside of the lifting frames (8) is symmetrically slidably connected with roller platforms (14). A first connecting rod (15) is fixedly connected between two roller platforms (14), and the end of the first connecting rod (15) is rotatably connected to the upper straightening roller (401).

3. A high-precision straightening machine based on multi-roller combination according to claim 2, characterized in that: The lifting adjustment assembly includes a first threaded rod (13), a worm (16), a worm wheel (17), a first control handle (18), and a third sliding rod (34). A third sliding rod (34) is slidably connected inside the lifting frame (8) on one side, and the third sliding rod (34) is fixedly connected to the roller table (14) on the same side; a square frame (12) is fixedly connected to the top of the lifting frame (8) on the other side, the worm gear (17) is rotatably connected inside the square frame (12), the worm (16) is rotatably connected inside the square frame (12), and meshes with the worm gear (17) for transmission, the first control handle (18) is fixedly connected to the end of the worm (16), the first threaded rod (13) is slidably connected to the outside of the square frame (12) and threadedly connected to the center position of the worm gear (17), and the end of the first threaded rod (13) is fixedly connected to the roller table (14) on the opposite side.

4. A high-precision straightening machine based on multi-roller combination according to claim 3, characterized in that: A hydraulic cylinder (26) is installed on the inner bottom of the rack (3), and a plurality of first sliding rods (19) are fixedly connected to the inner bottom of the rack (3). The output end of the hydraulic cylinder (26) is fixedly connected to the moving platform (20), and the moving platform (20) is slidably connected to the first sliding rods (19).

5. A high-precision straightening machine based on multi-roller combination according to claim 4, characterized in that: The top of the moving platform (20) is symmetrically fixedly connected to a support plate (21). The outside of the support plate (21) is rotatably connected to a second control handle (22). The connecting end of the second control handle (22) is fixedly connected to a second threaded rod (23). The second threaded rod (23) is rotatably connected to the support plate (21). The inside of the support plate (21) is symmetrically fixedly connected to a second sliding rod (24). The outside of the second sliding rod (24) is slidably connected to a square slider (28). The square slider (28) is threadedly connected to the second threaded rod (23). The transmission platform (25) is fixedly connected to the square slider (28).

6. A high-precision straightening machine based on multi-roller combination according to claim 5, characterized in that: The transmission assembly includes a third gear (29), a fourth gear (30), a second transmission belt (31), and a circular rotating block (32). The third gear (29) and the fourth gear (30) are rotatably connected to the two ends inside the transmission platform (25), respectively. The second transmission belt (31) meshes with the outside of the third gear (29) and the fourth gear (30) and is connected to them in a transmission manner. Multiple circular rotating blocks (32) are rotatably connected inside the transmission platform (25) and located inside the second transmission belt (31). A second motor (27) is installed on the outside of the transmission platform (25). The output shaft of the second motor (27) extends into the transmission platform (25) and is connected to the third gear (29) in a transmission manner.

7. A high-precision straightening machine based on multi-roller combination according to claim 6, characterized in that: The work frame (2) is symmetrically fixedly connected to a plurality of mounting frames (7). Each mounting frame (7) is rotatably connected to a second connecting rod (33) via a bearing. One end of the second connecting rod (33) is fixedly connected to the corresponding lower straightening roller (402), and the other end is fixedly connected to a transmission gear set.

8. A high-precision straightening machine based on multi-roller combination according to claim 7, characterized in that: The transmission gear set includes multiple first gears (901) and multiple second gears (902). The first gear (901) and the second gear (902) are arranged along the first axis and correspond one-to-one with the lower straightening roller (402). The gears at the beginning and end are single gears, and the gears in the middle are double gears. The gear closer to the work frame (2) is the first gear (901), and the gear further away from the work frame (2) is the second gear (902). The adjacent first gears (901) and the adjacent second gears (902) are connected by meshing transmission through the first transmission toothed belt (11).

9. A high-precision straightening machine based on multi-roller combination according to claim 8, characterized in that: A shelf (5) is installed on the top of the device platform (1). A first motor (6) is installed inside the shelf (5). The output shaft of the first motor (6) is connected to a first gear (901) located at one end via a coupling.

10. A high-precision straightening machine based on multi-roller combination according to claim 9, characterized in that: The surfaces of the upper straightening roller (401) and the lower straightening roller (402) are both provided with textures and coatings to increase friction.

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